<script setup>
import { ref } from 'vue'
// 图片列表
defineProps({
  imageList: {
    type: Array,
    default: () => []
  }
})
const activeIndex = ref(0) //当前激活图片下标
const changeActive = (index) => {
  activeIndex.value = index
}

</script>


<template>
  <div class="goods-image">
    <!-- 左侧大图-->
    <div ref="target" class="middle">
      <img :src="(imageList[activeIndex])" alt="" width="100%" height="100%"/>
      <!-- 蒙层小滑块 -->
      <!-- <div class="layer" :style="{ left: `0px`, top: `0px` }"></div> -->
    </div>
    <!-- 小图列表 -->
    <ul class="small">
      <li v-for="(img, i) in imageList" :key="i" :class="{ active: i === activeIndex }" @mouseenter="changeActive(i)">
        <img :src="(img)" alt="" style="object-fit: cover"/>
      </li>
    </ul>
    <!-- 放大镜大图 -->
    <div v-show="false" :style="[
            {
                backgroundImage: `url(${imageList[0]})`,
                backgroundPositionX: `0px`,
                backgroundPositionY: `0px`,
            },
        ]" class="large"></div>
  </div>
</template>

<style lang="scss" scoped>
.goods-image {
  width: 480px;
  height: 400px;
  position: relative;
  display: flex;

  .middle {
    width: 400px;
    height: 400px;
    background: #f5f5f5;
  }

  .large {
    position: absolute;
    top: 0;
    left: 412px;
    width: 400px;
    height: 400px;
    z-index: 500;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    background-repeat: no-repeat;
    // 背景图:盒子的大小 = 2:1  将来控制背景图的移动来实现放大的效果查看 background-position
    background-size: 800px 800px;
    background-color: #f8f8f8;
  }

  .layer {
    width: 200px;
    height: 200px;
    background: rgba(0, 0, 0, 0.2);
    // 绝对定位 然后跟随咱们鼠标控制left和top属性就可以让滑块移动起来
    left: 0;
    top: 0;
    position: absolute;
  }

  .small {
    width: 80px;

    li {
      width: 68px;
      height: 68px;
      margin-left: 12px;
      margin-bottom: 15px;
      cursor: pointer;

      &:hover,
      &.active {
        border: 2px solid $lt-main-text-color;
      }
    }
  }
}
</style>
